Brochure

Dimensions
Specifications
310: Pressure Loss
Flow Rate (gpm)
Head (ft)
100
110
120
70
60
90
80
50
40
30
10
20
0
8.06.0402.00.0
50
45
40
35
30
25
20
15
10
5
0
Pressure Loss (psi)
1.0 3.0 5.0 7.0 9.0
310: Flow Rate vs. Temperature Rise
Temperature Rise (˚F)
Flow Rate (gpm)
100806040200.0
8.0
9.0
7.0
6.0
5.0
1.0
2.0
3.0
4.0
0
10
30
50 70 90 110
13-3/4" (350mm)
10" (254mm)
1-3/4" (45mm) 1-3/4" (45mm)
1-3/8" (36mm)
21-3/8" (544mm) 20-1/4" (520mm)
1-7/8" (47mm)
HOT
5-1/4" (133mm)
120V 1-3/8" (36mm)
GAS 4-7/8" (124mm)
COLD 3-1/4" (84mm)
4-3/8" (113mm)
1-5/8" (43mm)
19-3/8" (493mm)
COLD 2-7/8" (71mm)
1" (26mm)
HOT 6-1/2" (164mm)
9-1/2" (241mm)
120VAC 3-7/8" (99mm)
GAS 5-1/4" (135mm)
4" (101 mm)
Indoor and Outdoor Installation Options
Power Vent or Power Direct Vent Design
Low NOx Emissions
4” Category III Vent
Flow Rate up to 8.0 GPM
• Values based on factory testing. 0.4 GPM required for
continuous fire after initial ignition
Water Pressure: 15-150 psi
• Pressure Only Relief Valve Requires (Min 190,000 btu/h,
150 psi).
• 40 psi or above recommended for max. flow
Warranty
• 15-year limited warranty on heat exchanger in residential
applications.
• 5-year limited warranty on heat exchanger in commercial
applications.
• 5-year warranty on all parts.
• Refer to hotwater.com for further warranty details
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